Speaker
Description
In recent years, Additive Manufacturing in Construction (AMC) has been gradually transforming the industry by offering a faster and more efficient way to build with concrete. Unlike traditional methods that rely on molds, AMC deposits material layer by layer, allowing new possibilities for custom designs and complex shapes. AMC also digitalizes the construction process, which helps reduce labor costs, cut material waste, and streamline the transition from design to construction. To optimize these advantages, AMC requires appropriate modeling of building components and deposition processes.
Many developments have focused on digital methods for designing parts and planning AMC processes while others provide numerical simulations to predict failures of AMC structures. Our study contributes to the latter, aiming to develop a modeling and simulation approach for bulk-deposited AMC concrete and its interlayers. From this, a reduced substitute model is developed to reduce the computational cost of simulating complex geometries on a part-scale.
Our starting point is developing and validating the viscoplastic material model of shotcrete 3D printing. Bingham-type rheology is used to model the thixotropic behavior of freshly printed shotcrete. In addition, interlayers are represented by cohesive zone elements to simulate how layers settle as new ones are added. Finally, the material model is incorporated into the finite element method and is validated against experimental results.
